/*!
 * Crypto-JS v1.1.0
 * http://code.google.com/p/crypto-js/
 * Copyright (c) 2009, Jeff Mott. All rights reserved.
 * http://code.google.com/p/crypto-js/wiki/License
 */

const Crypto = require('./crypto.js');

(function() {
// Shortcut
  var util = Crypto.util

  // Public API
  var SHA1 = Crypto.SHA1 = function(message, options) {
    var digestbytes = util.wordsToBytes(SHA1._sha1(message))
    return options && options.asBytes ? digestbytes
      : options && options.asString ? util.bytesToString(digestbytes)
        : util.bytesToHex(digestbytes)
  }

  // The core
  SHA1._sha1 = function(message) {
    var m = util.stringToWords(message)
    var l = message.length * 8
	  var w = []
    var H0 = 1732584193
    var H1 = -271733879
    var H2 = -1732584194
    var H3 = 271733878
    var H4 = -1009589776

    // Padding
    m[l >> 5] |= 0x80 << (24 - l % 32)
    m[((l + 64 >>> 9) << 4) + 15] = l

    for (var i = 0; i < m.length; i += 16) {
      var a = H0
      var b = H1
      var c = H2
      var d = H3
      var e = H4

      for (var j = 0; j < 80; j++) {
        if (j < 16) w[j] = m[i + j]
        else {
          var n = w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16]
          w[j] = (n << 1) | (n >>> 31)
        }

        var t = ((H0 << 5) | (H0 >>> 27)) + H4 + (w[j] >>> 0) + (
          j < 20 ? (H1 & H2 | ~H1 & H3) + 1518500249
            : j < 40 ? (H1 ^ H2 ^ H3) + 1859775393
              : j < 60 ? (H1 & H2 | H1 & H3 | H2 & H3) - 1894007588
                : (H1 ^ H2 ^ H3) - 899497514)

        H4 = H3
        H3 = H2
        H2 = (H1 << 30) | (H1 >>> 2)
        H1 = H0
        H0 = t
      }

      H0 += a
      H1 += b
      H2 += c
      H3 += d
      H4 += e
    }

    return [H0, H1, H2, H3, H4]
  }

  // Package private blocksize
  SHA1._blocksize = 16
})()

module.exports = Crypto
